Prediction method for riprap falling distance of radial tidal current river reach

Abstract

The invention relates to a radial tidal current river reach riprap falling distance prediction method, and the method comprises the following steps: establishing a radial tidal current river reach water flow condition prediction model based on a one-dimensional long river reach tidal current prediction mathematical model and a two-dimensional hydrodynamic mathematical model by carrying out a riprap settlement process water tank test, and finally, predicting the riprap falling distance in the radial tide process based on the radial tide reach water flow condition prediction model, a falling distance formula and a throwing construction control condition. By the adoption of the method, the riprap falling distance of the radial tidal river reach can be accurately predicted, the construction efficiency and quality are greatly improved, and reference and basis are provided for prediction of the riprap falling distance of the similar tidal river reach in the future.

Description

technical field [0001] The present invention relates to the fields of river course regulation engineering and waterway regulation project, in particular to the field of river regulation in the radial and tidal river section, and the field of riprap project for waterway regulation. Background technique [0002] Rock riprap works have been widely used in river channel regulation and waterway regulation such as embankment reinforcement, beach protection, river regime control and guidance. For the middle and upper reaches of the Yangtze River, it is mainly controlled by runoff, and the water flow is unidirectional, and in a long period of time The flow velocity and water depth are kept stable. In the riprap construction of this kind of river section, the on-site riprap drop distance test can be carried out before construction, and the relationship curve between the riprap drop distance, flow velocity and water depth can be drawn, combined with the underwater target position of th...

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Problems solved by technology

[0003] In the tidal river section of the lower reaches of the Yangtze River, due to the joint action of runoff and tidal currents, changes in the strength of runoff and tidal currents lead to real-time changes in water flow direction, flow velocity, and water depth. It will cause the falling point of the riprap to deviate from the design position in the actual construction, resulting in super-throwing and waste of rocks, especially in the fine throwing stage of the dam body formation, and the throwing construction can only be carried out when the tide turns, which reduces the construction efficiency

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